The half-wave rectifier kept only those parts of the original input signal
that were positive (or negative). Is there a way to keep both halves of the
input signal, and yet render them both with the same output polarity? This
is the behaviour of a full-wave rectifier. The circuit shown above
performs full-wave rectification on the input signal, as shown. If you wish
the final output to be positive instead of negative, simply reverse the two
diodes in the half-wave rectifier section.

The full-wave rectifier depends on the fact that both the half-wave
rectifier and the summing amplifier are precision circuits. It operates by
producing an inverted half-wave-rectified signal and then adding that signal at double amplitude to the original signal in
the summing amplifier. The result is a reversal of the selected polarity of
the input signal.

The resistor values shown are reasonable; the resistors themselves must be
of high precision in order to keep the rectification process accurate. If
for some reason you must build such a circuit with a different set of
resistance values, you must maintain the indicated 2:1 resistance ratio,
and you must still use precision resistors in order to obtain accurate
results.

Circuit Diagram:-

DESIGN:-

PROCEDURE: -

1. Connect the circuit as per the circuit diagram.

2. Give a sinusoidal input of VPP, 1 KHz from a signal generator.

3. Switch on the power supply and note down the output from CRO.

4. Without Connecting Rf2, the wave form of the half wave rectifier is
produced.

5. At some value of Rf2 the wave form of a full wave rectifier is obtained.

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